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Pierre Joubert
Joined: 09 Mar 2012
Posts: 1605
Location: Western Cape
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 Posted: May 31, 2014 16:39 Post subject: Re: Don Lum Collection |
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Congratulations on your nice Brandberg amethyst Don.
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Pierre Joubert
'The tree of silence bears the fruit of peace. ' |
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Don Lum
Joined: 03 Sep 2012
Posts: 2856
Location: Arkansas
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| Posted: May 31, 2014 17:58 Post subject: Re: Don Lum Collection |
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| Pierre Joubert wrote: | | Congratulations on your nice Brandberg amethyst Don. |
Thank you very much, Pierre. I hope Riana is feeling better.
Regards,
Don
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Don Lum
Joined: 03 Sep 2012
Posts: 2856
Location: Arkansas
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| Posted: Jun 01, 2014 13:41 Post subject: Re: Don Lum Collection |
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Mr. John S. White published an article in the May/June issue of Rocks and Minerals on Polyhedroid Agates. This inspired me to look at the few pieces that I collected a number of years ago and to my surprise was able to find them. Mr. White writes about how they are formed and the other names which one might find in the literature such as pseudo-agate, polyhydrolithe, and polyhedric quartz or quartz polyhedroids or even box quartz. Other names which are used are Paraiba-agate and polygonal quartz.
Mr. White notes, "The most famous and probably the most prolific source for polyhedroids is the Garguelo Farm south-southwest of Cajazeiras, in the Municipe de Cachieura dos Indios, Paraiba, Brazil."
My specimens came with a label Paraiba, Brazil as the location. They are polished slices.
| Description: |
Quartz variety agate
Paraiba, Brazil
16.7 x 5.7 cm
Polyhedroid agate |
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| Viewed: |
27792 Time(s) |
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| Description: |
Quartz variety agate
Paraiba, Brazil
10 .2 x 9.3 cm
Polyhedroid agate |
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| Viewed: |
27829 Time(s) |
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| Description: |
Quartz variety agate
Paraiba, Brazil
9.3 x 6.5 cm
Polyhedroid agate |
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| Viewed: |
27815 Time(s) |
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Pierre Joubert
Joined: 09 Mar 2012
Posts: 1605
Location: Western Cape
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| Posted: Jun 02, 2014 03:05 Post subject: Re: Don Lum Collection |
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Hi Don. I find these agates fascinating (the outward facets). Thank you for showing.
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Pierre Joubert
'The tree of silence bears the fruit of peace. ' |
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Don Lum
Joined: 03 Sep 2012
Posts: 2856
Location: Arkansas
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| Posted: Jun 02, 2014 09:21 Post subject: Re: Don Lum Collection |
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| Pierre Joubert wrote: | | Hi Don. I find these agates fascinating (the outward facets). Thank you for showing. |
Hello Pierre,
Thank you for for nice comment.
I have been enjoying your posts and unusual finds.
Hello to Riana.
Don
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Pierre Joubert
Joined: 09 Mar 2012
Posts: 1605
Location: Western Cape
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| Posted: Jun 02, 2014 12:21 Post subject: Re: Don Lum Collection |
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| Don Lum wrote: | | Pierre Joubert wrote: | | Hi Don. I find these agates fascinating (the outward facets). Thank you for showing. |
Hello Pierre,
Thank you for for nice comment.
I have been enjoying your posts and unusual finds.
Hello to Riana.
Don |
Hi Don. Thank you for your kind regards. I searched these agates and found Mr. White's article.
https://www.rocksandminerals.org/Back%20Issues/2014/May-June%202014/mineral-mysteries-abstract.html
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Pierre Joubert
'The tree of silence bears the fruit of peace. ' |
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Don Lum
Joined: 03 Sep 2012
Posts: 2856
Location: Arkansas
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Don Lum
Joined: 03 Sep 2012
Posts: 2856
Location: Arkansas
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| Posted: Jun 02, 2014 13:13 Post subject: Re: Don Lum Collection |
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Polyhedroid Agates
| Description: |
Quartz var agate
Paraiba, Brazil
10.2 x 5.3 cm
Polyhedroid Agate |
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| Viewed: |
27908 Time(s) |
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| Description: |
Quartz var agate
Paraiba, Brazil
12.5 x 8.3 cm
Polyhedroid Agate |
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| Viewed: |
27770 Time(s) |
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Don Lum
Joined: 03 Sep 2012
Posts: 2856
Location: Arkansas
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| Posted: Jun 03, 2014 13:41 Post subject: Re: Don Lum Collection |
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Goethite (FeO(OH) named after the German polymath and poet Johann Wolfgang von Goethe (1749–1832), an iron bearing hydroxide mineral of the diaspore group, is found in soil and other low-temperature environments. Goethite has been well known since prehistoric times for its use as a pigment (ochre). Evidence has been found of its use in paint pigment samples taken from the caves of Lascaux in France. It was first described in 1806 for occurrences in the Hollertszug Mine, Dermbach, Herdorf, Siegerland, Rhineland-Palatinate, Germany. (ref Wikipedia)
| Description: |
Goethite, Quartz
Amerzgane, Ouarzazate Province, Souss-Massa-Draa Region, Morocco
15 x 12 cm, 12.7 x 8.6 cm
Concave geode lined with colorless quartz crystals with sprays of divergent and radiating black lustrous metallic clusters of acicular goethite crystals. |
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| Viewed: |
27615 Time(s) |
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| Description: |
Goethite, Quartz
Amerzgane, Ouarzazate Province, Souss-Massa-Draa Region, Morocco
15 x 12 cm, 12.7 x 8.6 cm |
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27650 Time(s) |
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| Description: |
Vanadinite, Manganese Oxides
Taouz, Er Rachidia, Meknès-Tafilalet, Morocco
9 x 7.5 x 7 cm |
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27611 Time(s) |
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| Description: |
Vanadinite, Manganese Oxides
Taouz, Er Rachidia, Meknès-Tafilalet, Morocco
9 x 7.5 x 7 cm |
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| Viewed: |
27622 Time(s) |
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| Description: |
Vanadinite, Manganese Oxides
Taouz, Er Rachidia, Meknès-Tafilalet, Morocco
9 x 7.5 x 7 cm |
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| Viewed: |
27660 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2067
Location: Oklahoma
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| Posted: Jun 03, 2014 14:50 Post subject: Re: Don Lum Collection |
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That is a nice group of polyhedroids Don. Made all the more interesting by John White's recent article in R&M.
Michael
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Don Lum
Joined: 03 Sep 2012
Posts: 2856
Location: Arkansas
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| Posted: Jun 03, 2014 14:56 Post subject: Re: Don Lum Collection |
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| crosstimber wrote: | That is a nice group of polyhedroids Don. Made all the more interesting by John White's recent article in R&M.
Michael |
Thank you, Michael. I enjoyed Mr. White's article.
Hello to Laura.
Don
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Don Lum
Joined: 03 Sep 2012
Posts: 2856
Location: Arkansas
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| Posted: Jun 04, 2014 12:55 Post subject: Re: Don Lum Collection |
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Goethite
| Description: |
Goethite
Montreal Mine, 35th Level, Montreal, Iron County, Wisconsin, USA
8.7 x 5.1 cm |
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| Viewed: |
27555 Time(s) |
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| Description: |
Goethite
Montreal Mine, 35th Level, Montreal, Iron County, Wisconsin, USA
8.7 x 5.1 cm |
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| Viewed: |
27919 Time(s) |
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| Description: |
Goethite
Garland County, Arkansas, USA
6.7 x 4.3 cm |
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| Viewed: |
27576 Time(s) |
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Don Lum
Joined: 03 Sep 2012
Posts: 2856
Location: Arkansas
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| Posted: Jun 06, 2014 20:04 Post subject: Re: Don Lum Collection |
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Amazonite and Smoky Quartz
| Description: |
Microcline var amazonite, Quartz var smoky
Bear Creek,, El Paso County, Colorado, USA
9 x 8.7 cm |
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| Viewed: |
27393 Time(s) |
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| Description: |
Microcline var amazonite, Quartz var smoky
Bear Creek,, El Paso County, Colorado, USA
9 x 8.7 cm. |
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| Viewed: |
27427 Time(s) |
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Don Lum
Joined: 03 Sep 2012
Posts: 2856
Location: Arkansas
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| Posted: Jun 06, 2014 20:13 Post subject: Re: Don Lum Collection |
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Copper
| Description: |
Copper
Cole Shaft, Bisbee, Warren District, Mule Mountains, Cochise County, Arizona, USA
7.0 x 6.0 cm
cubic copper crystals |
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| Viewed: |
27417 Time(s) |
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| Description: |
Copper
Cole Shaft, Bisbee, Warren District, Mule Mountains, Cochise County, Arizona, USA
7.0 x 6.0 cm
cubic copper crystals |
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| Viewed: |
27401 Time(s) |
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| Description: |
Copper
Cole Shaft, Bisbee, Warren District, Mule Mountains, Cochise County, Arizona, USA
7.0 x 6.0 cm
cubic copper crystals |
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| Viewed: |
27430 Time(s) |
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| Description: |
Copper
Phoenix Mine, Phoenix, Keweenaw County, Michigan, USA
5.0 x 3.0 cm |
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| Viewed: |
27416 Time(s) |
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Don Lum
Joined: 03 Sep 2012
Posts: 2856
Location: Arkansas
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| Posted: Jun 07, 2014 06:40 Post subject: Re: Don Lum Collection |
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Copper
| Description: |
Copper
Ray Mine, Pinal County, Arizona, USA
5.3 x 4.0 cm |
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| Viewed: |
27325 Time(s) |
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| Description: |
Copper
Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia
5.1 x 4.8 cm |
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| Viewed: |
27323 Time(s) |
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| Description: |
Copper, Cuprite
Rubtsovskoe Cu-Zn-Pb Deposit, Rudnyi Altai, Altaiskii Krai, Western-Siberian Region, Russia
6.0 x 3.0 cm |
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| Viewed: |
27298 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2067
Location: Oklahoma
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| Posted: Jun 07, 2014 09:09 Post subject: Re: Don Lum Collection |
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| Nice cubic copper crystals from the Cole Shaft.
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Don Lum
Joined: 03 Sep 2012
Posts: 2856
Location: Arkansas
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| Posted: Jun 07, 2014 09:17 Post subject: Re: Don Lum Collection |
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| crosstimber wrote: | | Nice cubic copper crystals from the Cole Shaft. |
Thank you, Michael.
Hello to Laura.
Don
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Don Lum
Joined: 03 Sep 2012
Posts: 2856
Location: Arkansas
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| Posted: Jun 07, 2014 18:03 Post subject: Re: Don Lum Collection |
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Re-do of previously posted specimen. Better picture.
| Description: |
Copper
Phoenix Mine, Phoenix, Keweenaw County, Michigan, USA
5.0 x 3.0 cm |
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| Viewed: |
27163 Time(s) |
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Don Lum
Joined: 03 Sep 2012
Posts: 2856
Location: Arkansas
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| Posted: Jun 08, 2014 10:16 Post subject: Re: Don Lum Collection |
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Copper
| Description: |
Copper
Ojibway Mine, Ojibway, Keweenaw County, Michigan, USA
4.3 x 3.3 cm |
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| Viewed: |
27178 Time(s) |
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| Description: |
Copper
Central Mine, Central, Keweenaw County, Michigan, USA
4.3 x 3.1 cm |
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| Viewed: |
27143 Time(s) |
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| Description: |
Copper pseudomorph after cuprite
Block 1-1, Rubtsovskiy Mine, Altaiskiy Krai, Siberia, Russia
4.3 x 3.0 cm |
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| Viewed: |
27201 Time(s) |
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| Description: |
Copper pseudomorph after cuprite
Block 1-1, Rubtsovskiy Mine, Altaiskiy Krai, Siberia, Russia
4.3 x 3.0 cm |
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| Viewed: |
27129 Time(s) |
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| Description: |
Copper pseudomorph after cuprite
Block 1-1, Rubtsovskiy Mine, Altaiskiy Krai, Siberia, Russia
4.3 x 3.0 cm |
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| Viewed: |
27139 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2067
Location: Oklahoma
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| Posted: Jun 08, 2014 10:27 Post subject: Re: Don Lum Collection |
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I have a soft spot for Michigan coppers ever since I collected there as a boy many years ago. I love the crystallization on your Ojibway copper - nice piece.
Michael
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